Latest Spectral Analysis Articles and Videos

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How the PowerQuad Co-processor Frees Up CPU Cores in the LPC55S69 MCU

In this article, learn about the PowerQuad co-processor and its role in performing CPU-heavy tasks to allow the Arm Cortex-M33 cores to execute other tasks in the LPC55S69 MCU.

November 19, 2020 by Eli Hughes, NXP Semiconductors

Researchers in Japan Claim New Quantum Circuit Can Compute the Fast Fourier Transform

Looking to build upon pre-existing quantum Fourier transform implementations, researchers in Japan have turned to the Fast Fourier Transform.

October 20, 2020 by Jake Hertz

What Is the Sinc Function and Why Is It Important in Electrical Engineering?

This Frequent Engineering Question gives a quick overview of a mathematical function that appears frequently in digital signal processing.

September 23, 2020 by Robert Keim

What Is the Fourier Transform?

This article gives you essential information on a mathematical technique that plays an absolutely fundamental role in system design and signal processing.

July 30, 2020 by Robert Keim

Anti-Aliasing Filters: Applying Sampling Theory to ADC Design

This article examines an important aspect of the Nyquist–Shannon sampling theorem and explains its connection to the need for anti-aliasing filters in analog-to-digital conversion.

May 20, 2020 by Robert Keim

The Nyquist–Shannon Theorem in the Frequency Domain

This article continues our discussion of sampling theory and introduces the concept of aliasing.

May 07, 2020 by Robert Keim

The Longer the PCB Trace, the Greater the Signal Distortion. Redrivers Can Help

Laptop or desktop PC designers know the woes of USB signal loss down a 12-inch PCB trace. The good news is there's a device purpose-built to strengthen signals the whole way across.

April 10, 2020 by Steve Arar

How Do You Design an LC Low-Pass Filter for a Class D Amp?

What's the role of low-pass filters in class D amplification? We'll use ST's new class D amp to discuss this question.

March 09, 2020 by Robert Keim

Assessing the ADC SNR and SFDR for Communications Systems

In this article, we will see how we can determine the SFDR for an ADC used in a radio receiver. Also, we’ll examine the ADC SNR requirement for this application.

December 22, 2019 by Steve Arar

Understanding Different Definitions of the Spurious Free Dynamic Range (SFDR) Specification

In this article, we’ll look at the spurious free dynamic range (SFDR) which is a popular specification for quantifying the linearity of a circuit.

December 01, 2019 by Steve Arar

Noise in Electronics Engineering: Distribution, Noise RMS and Peak-to-Peak Value, and Power Spectral Density

In this article, we’ll first examine an important feature of common noise sources: the relationship between the noise root mean square (RMS) and peak-to-peak value.

November 20, 2019 by Steve Arar

The Relationship Between Rise Time and Bandwidth in Digital Signals

In this article, we’ll look at the relationship between the rise/fall time of a digital signal and its bandwidth.

October 10, 2019 by Steve Arar

Low-Noise Voltage References: Understanding the Noise Performance of a Voltage Reference IC

Working with a low noise voltage reference? Learn more about noise specifications and relevant voltage reference ICs.

July 01, 2019 by Steve Arar

Quantization Noise and Amplitude Quantization Error in ADCs

Learn the methods and applications of modeling the quantization error of an ADC using a noise source.

April 22, 2019 by Steve Arar

Understanding Amplitude Quantization Error for ADCs

This article examines the quantization error of an analog-to-digital converter.

April 17, 2019 by Steve Arar

Resolving the Signal Part 12: Reducing the Effects of Power-Supply Noise using Delta-Sigma ADCs

In part 12 of Resolving the Signal, we look at a power-supply noise design example to discuss which supplies are most critical when trying to increase a system's PSR. From that example, we offer best practices to maintain low power-supply noise and debugging tips for a system's overall noise performance.

January 29, 2019 by Bryan Lizon, Texas Instruments

Resolving the Signal Part 10: How Clock Signals Affect Precision ADCs

Part 10 of the Resolving the Signal series covers how clocks affect precision ADCs, touching on clock jitter, clock intermodulation and best PCB layout practices for clocking.

November 06, 2018 by Bryan Lizon, Texas Instruments

Intro Software Walkthrough: Fast Fourier Transforms and the Xilinx FFT IP Core

This article will explain some of the most important settings and design parameters for the Xilinx FFT IP core and function as a basic walkthrough of the Fast Fourier Transform interface.

October 17, 2018 by Steve Arar

Audio Processing in Scilab: How to Implement Spectrum Subtraction

This article discusses a technique in which frequency-domain subtraction is used to selectively suppress the noise components in an audio signal.

September 20, 2018 by Robert Keim

How to Use Scilab to Analyze Frequency-Modulated RF Signals

Computing a discrete Fourier transform can help you to analyze the ways in which RF modulation affects the spectrum of a carrier signal.

September 11, 2018 by Robert Keim